@charset "UTF-8";
:root{--paper:#f6f4ef;--ink:#242722;--muted:#6b7067;--line:#dedfd6;--accent:#a43d28;--soft:#eeebe3;--serif:"Songti SC","Noto Serif CJK SC","Source Han Serif SC",Georgia,serif;--sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:108px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.9;-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}a{color:inherit;text-underline-offset:4px}a:hover{color:var(--accent)}button{cursor:pointer}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--accent);outline-offset:4px}button{color:inherit}.skip{position:fixed;left:15px;top:-100px;z-index:100;background:var(--ink);color:white;padding:12px}.skip:focus{top:10px}.reading-line{position:fixed;top:0;left:0;height:3px;background:var(--accent);width:0;z-index:30}
.topbar{height:78px;border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 40px;gap:36px;position:sticky;top:0;background:rgba(246,244,239,.97);z-index:20}.brand{display:flex;align-items:center;gap:12px;font-size:15px;font-weight:650;white-space:nowrap;text-decoration:none}.brand-mark{display:grid;place-items:center;width:32px;height:32px;background:var(--accent);color:var(--paper);font-family:var(--serif);font-size:20px;border-radius:6px}.edition{font-size:10px;letter-spacing:1.7px;color:var(--muted)}.top-actions{margin-left:auto;display:flex;gap:12px;align-items:center}.top-actions button{border:1px solid var(--line);background:transparent;border-radius:6px;font-size:12px;padding:7px 12px;white-space:nowrap}.top-actions button:hover{background:var(--soft)}.top-actions kbd{font-size:11px;padding:1px 5px;margin-left:18px;border:1px solid var(--line);border-radius:3px;color:var(--muted)}#search-open>span{font-size:21px;line-height:1;margin-right:5px}#menu{display:none}
.layout{display:grid;grid-template-columns:250px minmax(0,900px);gap:76px;max-width:1320px;margin:auto;padding:0 40px}aside{position:sticky;top:114px;align-self:start;height:calc(100vh - 138px);overflow:auto;padding:13px 0 20px;scrollbar-width:thin}.toc-heading{display:flex;justify-content:space-between;font-size:12px;padding:0 10px 20px;border-bottom:1px solid var(--line)}.toc-heading span{font-size:9px;letter-spacing:1px;color:var(--muted)}nav{padding:17px 0 22px}nav a{display:flex;align-items:center;gap:16px;text-decoration:none;font-size:13px;line-height:1.5;padding:12px 10px;border-radius:5px;border-left:2px solid transparent;margin:2px 0}nav a>span{font-size:10px;font-family:monospace;color:#92958d}nav a.active{background:#eae7de;border-left-color:var(--accent);color:var(--accent);font-weight:600}nav a.active>span{color:var(--accent)}.sidebar-note{border-top:1px solid var(--line);padding:24px 10px 0;font-size:11px;color:var(--muted)}.sidebar-note>span{font-size:11px;letter-spacing:1px}.sidebar-note p{margin:12px 0 7px}.sidebar-note b{font-family:Georgia,serif;font-size:26px;line-height:1;color:var(--ink);font-weight:400}.check-track{height:3px;background:var(--line);margin:9px 0 18px}.check-track i{display:block;height:100%;background:var(--accent);width:0;transition:width .2s}.sidebar-note a{text-decoration:none}.repo-link{display:block;font-size:11px;color:var(--muted);margin:35px 10px 0;text-decoration:none}
main{min-width:0}.hero{padding:66px 0 20px}.eyebrow{text-transform:uppercase;letter-spacing:1.8px;font-size:11px;color:var(--accent);font-weight:600}.hero .eyebrow{display:flex;justify-content:space-between;gap:15px}.hero .eyebrow>span{letter-spacing:1px;font-size:10px;color:var(--muted);font-weight:400}.hero h1{font-family:var(--serif);font-size:clamp(42px,4.7vw,65px);font-weight:600;line-height:1.2;letter-spacing:-2px;margin:32px 0 24px}.hero-dot{color:var(--accent)}.hero-lead{font-size:22px;line-height:1.65;margin:0 0 18px;letter-spacing:.2px}.hero-intro{font-size:14px;color:var(--muted);max-width:510px;line-height:1.9;margin:0}.hero-meta{display:flex;gap:24px;flex-wrap:wrap;margin:22px 0;color:var(--muted);font-size:11px}.hero-meta span+span:before{content:"";border-left:1px solid var(--line);margin-right:24px}.hero-actions{display:flex;gap:27px;align-items:center;margin:28px 0 38px;font-size:12px}.hero-actions a{text-decoration:none}.hero-actions span{margin-left:20px}.primary{background:var(--ink);color:var(--paper);padding:11px 21px;border-radius:4px}.primary:hover{background:var(--accent);color:white}.hero-route{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 0}.hero-route a{text-decoration:none;padding:0 17px;border-left:1px solid var(--line)}.hero-route a:first-child{padding-left:0;border:0}.hero-route small{display:block;font-size:9px;color:var(--muted);letter-spacing:.8px;margin-bottom:6px}.hero-route strong{display:block;font-size:13px;font-weight:500}
.chapter{padding:60px 0 50px;border-bottom:1px solid var(--line);scroll-margin-top:12px}.chapter-meta{font-size:10px;letter-spacing:1.5px;color:var(--muted);display:flex;align-items:center;gap:13px}.chapter-meta>span{font-family:Georgia,serif;font-size:15px;color:var(--accent);letter-spacing:0;border:1px solid #d6b4a8;display:grid;place-items:center;width:29px;height:29px;border-radius:50%}.chapter h2{font-family:var(--serif);font-size:30px;line-height:1.5;letter-spacing:-.6px;font-weight:600;margin:18px 0 30px}.chapter h3{font-size:18px;line-height:1.6;letter-spacing:-.2px;font-weight:650;margin:37px 0 16px}.chapter p{margin:0 0 19px;font-size:15px;line-height:2.05;overflow-wrap:break-word}.chapter strong{font-weight:650}.chapter ul{padding-left:22px;margin:16px 0 26px}.chapter li{padding-left:4px;font-size:15px;margin-bottom:11px}.chapter li::marker{color:var(--accent)}.chapter p a,.chapter li a{color:var(--accent);text-decoration-color:#d4a79b}.chapter .source{font-size:11px;line-height:1.85;color:var(--muted);border-top:1px dashed var(--line);padding-top:20px;margin:33px 0 0}.chapter .small{font-size:11px;line-height:1.8;color:var(--muted)}
.table-scroll{overflow-x:auto;width:100%;margin:23px 0 29px;border:1px solid var(--line);border-radius:5px;background:#faf9f5}table{border-collapse:collapse;min-width:560px;width:100%;font-size:12px;line-height:1.85}th,td{text-align:left;padding:15px 17px;vertical-align:top;border-bottom:1px solid var(--line)}th{background:#eae9e1;font-size:11px;font-weight:600;white-space:nowrap}td:first-child{font-weight:550;min-width:120px;width:24%}tbody tr:last-child td{border-bottom:0}tbody tr:nth-child(even){background:#f2f1eb}figure{margin:28px 0}figure img{display:block;width:100%;height:auto;border-radius:5px}figcaption{font-size:10px;line-height:1.8;color:var(--muted);padding-top:10px}.flow{display:flex;flex-wrap:wrap;gap:8px 25px;margin:26px 0 35px}.flow>span{position:relative;border-bottom:2px solid #d4b5a9;padding:8px 2px;font-size:12px;font-weight:550}.flow>span:not(:last-child):after{content:"→";position:absolute;right:-21px;color:var(--accent)}
.code-wrap{position:relative;margin:24px 0;background:#eaece5;border:1px solid #d9ded1;border-radius:6px}.copy{position:absolute;top:10px;right:10px;font-size:10px;border:1px solid #cdd1c6;border-radius:4px;background:var(--paper);padding:5px 9px}.copy:hover{background:white}pre{white-space:pre-wrap;overflow-wrap:anywhere;margin:0;padding:49px 23px 24px;font:12px/2 var(--sans)}p code{padding:1px 5px;border-radius:3px;background:var(--soft);font-size:.9em}.picker{padding:26px;margin:28px 0;border:1px solid #cdd2c4;border-radius:6px;background:#ecefe6}.picker label{font-size:12px;margin-right:13px}.picker select{width:min(100%,240px);font-size:12px;background:var(--paper);border:1px solid #b9c1b0;border-radius:4px;padding:9px 12px;color:var(--ink)}.picker h3{font-size:18px;margin:24px 0 9px}.picker p{font-size:13px;margin-bottom:14px}.picker .eyebrow{font-size:10px;color:#526449;margin:0 0 14px}.picker .small{margin:18px 0 0;color:#65745d}.checklist{border-top:1px solid var(--line);margin:25px 0 15px}.checklist label{display:flex;align-items:flex-start;gap:13px;padding:13px 0;border-bottom:1px solid var(--line);cursor:pointer;font-size:13px}.checklist input{width:17px;height:17px;accent-color:var(--accent);flex-shrink:0;margin-top:5px}.checklist input:checked+span{color:var(--muted);text-decoration:line-through;text-decoration-color:#c0b6a9}.text-button{border:0;border-bottom:1px solid var(--line);background:none;padding:0;margin-left:15px;font-size:11px;color:var(--muted)}.quiz details{border-bottom:1px solid var(--line);padding:17px 0}.quiz summary{cursor:pointer;font-size:14px;font-weight:550;line-height:1.8;padding-right:10px}.quiz summary>span{font-family:Georgia,serif;margin:0 13px;color:var(--accent);font-size:12px}.quiz details p{font-size:13px;padding:15px 12px 0 40px;margin:0;color:var(--muted)}.mindmap{border:1px solid var(--line);border-radius:5px;padding:17px 20px;margin:27px 0}.mindmap summary{cursor:pointer;font-size:13px;font-weight:600}.mindmap summary span{font-weight:400;font-size:10px;color:var(--muted);margin-left:10px}.mindmap img{width:100%;height:auto;max-width:640px;margin:20px auto 0;display:block}.mindmap a{display:block}
footer{padding:30px 0 45px;font-size:11px;line-height:2;color:var(--muted)}footer p{margin:0 0 14px;color:var(--ink)}footer p span{margin-left:18px;color:var(--muted)}footer>a{display:inline-block;margin-right:24px;text-decoration:none}dialog{border:1px solid var(--line);border-radius:10px;background:var(--paper);color:var(--ink);padding:24px;width:min(640px,calc(100vw - 32px));max-height:80vh;box-shadow:0 30px 100px #18211330}dialog::backdrop{background:#222b2359;backdrop-filter:blur(3px)}.search-head{display:flex;justify-content:space-between;align-items:center;font-size:13px;margin-bottom:15px}.search-head button{background:none;border:0;font-size:26px;line-height:1;padding:6px}#search-input{width:100%;border:1px solid #c9cdc0;background:#fffdf8;padding:13px 14px;font-size:14px;border-radius:5px;color:var(--ink)}#search-status{font-size:11px;color:var(--muted);margin:14px 0}#search-results a{display:block;padding:14px 6px;border-top:1px solid var(--line);text-decoration:none;font-size:14px}#search-results small{display:block;color:var(--muted);font-size:11px;line-height:1.8;margin-top:5px}#search-results mark{background:#e5c9ba;color:var(--ink)}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%) translateY(90px);padding:9px 18px;border-radius:6px;background:var(--ink);color:var(--paper);font-size:12px;z-index:50;transition:transform .2s}#toast.visible{transform:translateX(-50%) translateY(0)}.noscript{padding:15px;text-align:center;font-size:12px}
@media(min-width:1450px){.layout{gap:90px}}@media(max-width:1100px){.layout{grid-template-columns:210px minmax(0,1fr);gap:40px;padding:0 28px}.topbar{padding:0 28px;gap:25px}.edition{display:none}.hero h1{font-size:52px}.hero .eyebrow{font-size:10px}.hero-route a{padding:0 12px}}
@media(max-width:800px){html{scroll-padding-top:92px}.topbar{height:65px;padding:0 21px;gap:12px}.brand{font-size:13px;gap:9px}.brand-mark{width:28px;height:28px;font-size:17px}.top-actions{gap:7px}.top-actions button{font-size:11px;padding:5px 9px}.top-actions kbd,.print-button{display:none}#menu{display:block}.layout{display:block;padding:0 23px;max-width:720px}.hero{padding-top:40px}.hero h1{font-size:48px;letter-spacing:-1.5px;margin-top:27px}.hero .eyebrow{font-size:9px;letter-spacing:1px}.hero .eyebrow>span{font-size:9px}.hero-lead{font-size:21px}.hero-intro{font-size:13px;max-width:470px}.hero-meta{font-size:10px;gap:8px 16px}.hero-meta span+span:before{display:none}.hero-actions{font-size:11px;gap:23px;margin:25px 0 30px}.hero-route{padding:18px 0}.hero-route small{font-size:8px;letter-spacing:0}.hero-route strong{font-size:11px}.hero-route a{padding:0 10px}.chapter{padding:44px 0 35px}.chapter h2{font-size:26px;line-height:1.5;margin-bottom:25px}.chapter h3{font-size:17px;margin-top:31px}.chapter p,.chapter li{font-size:14px;line-height:2}.chapter .source{font-size:10px}.chapter-meta{font-size:9px}.table-scroll{margin:22px 0}th,td{padding:12px 13px}.picker{padding:21px}.picker p{font-size:12px}.flow{gap:8px 25px}.flow>span{font-size:11px}aside{display:none;position:fixed;left:0;top:65px;width:min(330px,87vw);height:calc(100dvh - 65px);background:var(--paper);padding:23px;box-shadow:12px 10px 30px #2223;z-index:18;border-right:1px solid var(--line)}aside.open{display:block}.sidebar-note{padding-top:18px}.repo-link{margin-top:22px}.quiz summary{font-size:13px}.quiz details p{font-size:12px}.mindmap summary span{display:block;margin-left:16px}.checklist label{font-size:12px}footer p span{display:block;margin:0}pre{padding-left:17px;padding-right:17px;font-size:11px}}
@media(max-width:380px){.topbar{padding:0 14px}.brand{font-size:12px}#search-open{font-size:0}#search-open>span{font-size:22px;margin:0}.layout{padding:0 19px}.hero h1{font-size:42px}.hero-route strong{font-size:10px}.hero-meta{display:block}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media print{body{background:white;color:#111;font-size:11pt}.topbar,aside,.hero-actions,.hero-route,.copy,.picker,.reading-line,dialog,#toast,.skip,.text-button,.noscript{display:none!important}.layout{display:block;max-width:none;padding:0}.hero{padding:0 0 22px}.hero h1{font-size:34pt;line-height:1.1;margin:14px 0}.hero h1 br{display:none}.hero-lead{font-size:16pt}.hero-intro{max-width:none}.chapter{padding:22px 0;border-bottom:1px solid #ddd;break-inside:auto}.chapter h2{font-size:21pt;margin:10px 0 15px;break-after:avoid}.chapter h3{font-size:13pt;break-after:avoid;margin:20px 0 8px}.chapter p,.chapter li{font-size:10pt;line-height:1.7;orphans:3;widows:3}.table-scroll{overflow:visible;border-radius:0}table{min-width:0;font-size:8pt}th,td{padding:8px}tr{break-inside:avoid}thead{display:table-header-group}pre{padding:16px;font-size:9pt}figure{break-inside:avoid}.quiz details>p{display:block!important}.quiz details{break-inside:avoid}.mindmap{display:none}footer{padding:15px 0}footer a{display:none}a{color:inherit;text-decoration:none}@page{size:A4;margin:18mm}}